Spanner-wrench.



No. 761,881.' `151151111121111.JUNE 7, 1904. V. H. ERNST.

1 SPANNER WRENCH'. APPLICATION FILED APB'. 15, 1903.

NO MODEL.

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. atented J' une 7', 1904.

VPfarramt FFICE.

VICTOR H. ERNST, OF JERSEY CITY, NEV. JERSEY.

SPANNER- WRENCH.

' SPECIFICATION refining part of Letters Patent No. 761,881, dated June 7, 1904.

Application filed April 15,1903.

head of the spanner rigid or integral with the 1 stock and constructed to engage with a nut, and

I provide a movable bearing adjustable both longitudinally and laterally relative to the wrench-head, this second bearingbeing also adapted to permit of an elastic release when the spanner is moved backward to get a new hold on the nut.

In the accompanying drawings I have shown the construction of one form of spanner 'having my improvements applied thereto; but I do not limit myself to any particular detail of form or construction beyond what is called for by the claims hereto appended. Figure lis a side view of one form of a spanner-.wrench containing my improvements shown in operative adjustment with a nut.

Fig. 2 isa longitudinal section of the spanner, lshowing its adjustment for use with a nut of smaller diameter. F ig. 3 is a face view of the spanner looking in the direction of arrow 3, Fig. 2.

Referring to the drawings, the stockA (here shown inone piece) isv formed into a handle portion t at one end and a wrench-head a/ at the other end and is provided with grooves and recesses to hold the movable bearing and its adjusting mechanism, as hereinafter eX- plained.

The wrench-head a may be constructed in any suitable manner to` Vengage with a nut and preferably to make a positive engagement therewith. As shown by way of example, the wrench-head c is constructed to make a ratchetconnection with a nut, the gripping ,edge a2 being adapted to engage the sides of teeth c, formed by longitudinal grooves c in a nut c. l As shown, this gripping edge fisl Serial No. 152.653. (No model.)

preferably serrated croslswise of the tool to secure a firm grip on the edge of the tooth c; but this is not essential.

YThe second and movable bearing is in the form of a follower B, provided with a face b to make ,contact with the peripheryof the nut. As here shown, this bearing-facet is flat; but, as will be evident, it may be of any desirable contour. By my present invention the follower B is made so adjustable that the same spanner may be used with nuts of different sizes in diameter and yet in its various adjustments maintain such relation between the edge c2 and the contact or bearing face b that the spanner embraces approximately a quarter of the circumference of any one ofthe varioussized nuts it may act upon.

' As shown in the drawings, the follower B is mounted on a movable fulcrum in a recess a3 in the stock A. This fulcrum consists of a. pin d, passing through a perforation in the follower and through slots acut through each side of the stock,- into the recess a3. Bymaking this pin and the perforation slightly tapered a hammer-blow upon the larger end of the pin will firmly secure these parts together and a blow upon the smaller end will vloosen the pin suficiently for the Itool to be taken apart.- The pin d is of such a length that its two ends are' guided in the slots et ony each sideof the stock A, Fig. 3, and these elongated slots {l} permit of the longitudinal vmovement of the follower toward and from end in an aperture in the handle a and at the each side of the stock, and the nut f is of a IOO size that it may be readily rotated by the thumb and a iinger of the hand holding the Spanner.

rlhe recess a3 is cut deep enough, Figs. l and 2, to allow the follower B to turn on the pin Z as a pivot in any position the pin (Z may occupy in the slots This permits of the lateral adjustment of the follower, and by making this follower spring-actuated in one direction I obtain the elastic release, as hereinafter explained.

lVith the construction shown in the drawings a coiled spring m, partly held and guided in a hole in the follower, is compressed between the end wall of the hole and the head of a buffer n, so that this buffer is forced by the spring against the inner wall of the recess a3. This spring m being at the rear end of the follower beyond the pivot-pin (l normally tends to force the outer end of the follower laterally toward the wrench-head.

To make the positive lateral adjustment of the follower, 1 have shown an actuating-screw 0, guided in a perforation al in the stock, having one end bearing against the outer end of follower B and capable of being moved lengthwise by the adjusting-nut o', working on the screw 0 in a recess a, cut through the stock. A pin 0 on the screw 0 engagesin a groove (as at the side of the perforation a7 and prevents the screw o from rotating with the nut i'.

The adjustment of the spanner is made as follows: rl`he actuating-screw e is drawn down into the handle-aperture, and the follower B is also moved down-that is, to the right in the position shown in the drawings. The gripping edge a2 is then placed upon the edge of a tooth c of the nut, the edge of the tooth generally catching in one of the indentations on this edge, the laterally-adjusting nut fr turned until the actuating-screw o has forced the upper end of the follower B outward until it reaches a position approximately in line with the diameter of the nut at right angles to the diameter passing' through the point of contact at c2, and then the adjusting-nut f is turned until the actuating-screw c has forced the follower up against the periphery of the nut. By these two adjustments, lateral and longitudinal, of one follower B, I obtain a spanner that will eifectively grip various-sized nuts. Also when the spanner is taken from the nut or when the wrench-head is moved from engagement with one tooth c to engagement with the neXt tooth to take a new hold when tightening or loosening the nut the spring fm, will permit the upper end of the lfollower to give outwardly-that is, to slip backward on the periphery of the nut and thus readily release the grip of the spanner on the nut without disturbing the zuljustment.

From the foregoing it will be seen that thy pull on the nut in wrenching is exerted he the strongest part of the spanner --the stock itselfthat the adjustments ofthe second bearing make up for the dillerent contours and sizes of the nuts, and that while the lateral adjustment is positive for the action of the tool in wrenching it is resilient for the releasing action, so that neither of the two :uljustments of the spanner need be disturbed even il the wrench-head is constructed to make a more tightly locked connection with the nut.

lt will be evident that various modilications may be made in form and construction without departing from my invention.

l claim as my invention-w l. 1n a spanner-wrench, the combination with a stock provided with a \vre1u:h-he:ul, forming the outer, workingjaw ol the wrench, of a follower carried by said stock, and lneans for positively adjusting the said follower in two dilierent directions.

2. ln a spanner-wrench, the combination with a stock provided with a wrench-head, forming the outer, working jaw ol the wrelufh, of apivoted follower having' its pivot bearing in said stock, said follower being spring-aetnated in one direction, and means for positively adjusting the follower in the opposite direction.

3. In a spanner-wrench, the combination with a stock provided with a wrench-howl, forming the outer, working jaw of the wrench, of a pivoted follower having its pivot bearing in said stock and means for positively adjusting the follower laterally and longitmlinally relative to said wrench-head.

4. In Aa spanner-wrench, the combination with a stock provided with a nu'ench-head, forming the outer, working jaw olE the wrench, of a pivoted follower having its pivot bearing in said stock and capable ol a longitudinal movement therein, means for positively adjusting said follower longitiulinally, a spring tending to turn said follower on its pivot in one direction and means for positively adjusting it in the opposite direction. l

ln testimony whereofl have signed my name to this speciiication in the presence. ol two subscribing witnesses.

Vi tnesses:

Enlrn J. Giuswonn, MAnnLLn F. Lama. 

